According to a UK researcher, telling someone 'I love you' or making eye contact and smiling raises one's sex appeal.

In Aberdeen University psychologist Dr. Ben Jones's study, 230 men and women were shown flash cards with people's faces displaying different expressions. They were asked to rate the attractiveness of the individuals.

Faces that were smiling and seemingly making eye contact were rated higher than others.

University of Durham psychologist Dr Lynda Boothroyd said it best, "We like it when attractive people seem to be behaving positively towards us."

Read the rest of the BBC report.